Peters



(No Model.) 2 Sheets-Sheet 1.

W. WHITT-AKER.

MEGHANIGAL STOKBR.

No. 384,486. Patented June 12, 1888.

' I fi 14'- W N. PEYERS. Fhfllo-Lil'wgnphun Washington. D. C,

(No Model.) 2 Sheets-Sheet 2.

w. WHITTAKER.

MECHANICAL STOKER.

No. 384,486. Patented June 12, 1883.

N. PETERS, Photo-Limgnphun Walhingtofl, D. C.

UNITED STATES PA ENT Price.

WILLIAM WHITTAKER, OF BURNLEY, COUNTY OF LANCASTER, ENGLAND.

MECHANICAL STOKER.

SPECIFICATION forming part of LettersPatent No. 384,486, dated June 12, 1888.

Application filed October 18, 1887. Serial No.252,726.

which Ihave obtained patent in Great Britain,

No. 560, dated January 13, 1887,)of'which the following is a specification.

My stoker is constructed as follows: I employ the ordinary hoppers, one or more, for the reception of coal. In each hopper is a A- inclineor mid-feather, and below the incline are preferably two cylindrical feed-rollers (or one feed roller may be used) to feed the fuel to the shovel below. Between each wing of the incline is a slide-regulator, which increases or decreases the space between each of the feed-rollers and the bottom of each incline, and so regulates the supply of fuel to the feedrollers. The rotary shovel-box is formed with a central A-shaped mid-feather or incline for guiding the coal to the shovels.

The rotary shovel or shovels are preferably upon one driving-shaft, upon which is a worm operating a worm-wheel upon a stud or shaft, on which shaft is a disk with astud working in a slot on a pivoted arm. This pivoted arm carries a stud, to which is attached a horizontal bar, rod, or slide, to which it gives a backward and forward movement. This bar passes,pref erably,across the front of the hoppers,and has a number of pawls or' catches, which engage with catch-wheels onthe'shaft of the feed-rollers, arranged so that they work the feed-rollers alternately, and impart to them a rotary or partial rotary mot-ion, and by turning back the catches the feed-rollers are stopped, as required. One side of the flue can be fed at once. This arrangement is applicable to one, two, three, or other number of flued boilers. feed-roller only to each flue may be used.

In the drawings, Figure l is a front elevation of my improved stoker applied to a threeflued boiler. Fig. 2 is a sectional elevation of Fig. l,showing shovel-box and feed-roller.

Fig. 3 is a front elevation of my improved stoker applied to asingle-flued boiler, but with only one feed-roller to each shovel.

Aare thehoppersforthereception ofthecoal,

(No model.) Patented in England January 13, 1887, No. 560.

(in the hoppers are suitable /\-inc1ines, N,) below which are the feed-rollers B, which also act as measuring-rollers to feed or measure the fuel to the rotary shovel or shovels B below. On each feed-roller is a ratchet-wheel, O, operated by ratchet Dand bar or rod E. The circular brackets F keep the rod in position.

G is a lever pivoted on a suitable bracket, and attached by astud or pin, G, to the rod E, and by a second stud or pin, H, to the disk or plate J upon the shaft J, operated by the wormwheel K, and worm K upon the driving-shaft L, which is driven by a strap and fast and loose pulleys M from any going part of the mill. A backward and forward motion is imparted to the bar or rod E, which operates the feed-rollers B alternately, by means of the ratchets D and ratchet-wheels O, and imparts to the feed-rollers a partial rotary movement. By turning back any one of the catches or ratchets its corresponding feed-roller is stopped without interfcring with the working of the other feedrollers,so that one flue can be stopped for cleaning purposes while the other or others are working.

On each side or wing of the A-inclines N are regulating-slides 1?, each attached to levers B. By movingthe levers R upward or downward in their slots S they increase or decrease the opening leading to the feed-rolls, and so allow a smaller or larger quantity of coal to pass to the feed roller or rollers whichsupply the rotary shovel or shovels with fuel. The feedrollers are formed with aspace, T, between their peripheries and the case or box in which they revolve, and upon their peripheries are preferabl y formed projectionsor recesses U, which insure the feed being more positive than if the rollers are plain upon their peripheries; or, in lieu of having two feed-rollers to each flue, one feed-roller may be used, (see Fig. 3,) either to single, double, or other number of flued boilers. The pivoted plate V may also be used in combination with my improved stoker for regulating the throw and distribution of the fuel over the surface of the furnace by means of the screw W, which raises or lowers the plate V, and so regulates the throw and distribution of the fuel.

The above arrangement can be equally applied to one or to any number of flued boilers.

XVhcn applied to a three-fined boiler, (see Fig. 1,) a suitable trough or trunk, U, is employed to connect the feed-rollers with the box of the rotary shovel, which is driven by a strap from the driving-shaft of the top flues.

XVhat I claim as the invention, and desire to secure by Letters Patent, is-

1. The combination, with a boilenfurnace having a suitable hopper leading to said furnace, of one or more feed-rolls located in the said hopper, reciprocating pawl-carriers having pawls which engage with ratchets on the shafts of said rolls, and one or more rotary shovels arranged in said hopper below said f(36(1-10ll$, substantially as described.

2. The combination, with a boiler-furnace having a hopperleadingthercto, of one or more food rolls located within the hopper, a reciprocating bar having pawls engaging with ratchzo ets on the feed-rolls, one or more rotary shovels arranged in the hopper below the feed roll or rolls, and a lever pivot-ally connected to said bar and to a rotating disk having a crank-pin engaging with said lever, substantially as described. v

3. The combination, with a boiler-furnace having hoppers leading from the exterior thereto, of feed-rolls arranged in said hoppers, inclines arranged in the hoppers above said feed-rolls, and regulating-slides mounted on said inclines, to decrease or increase the opening leading to the feed-rolls, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

Vt ILLIA M VVH ITT AKER.

\Vitnesses:

JOHN E. WALsH, Patcnt/igcnt, (jrosslep Slrcct, Halifax, llorlts'hire.

ARTHUR C. HALL,

Manchester, England. 

